Painting

Makes my arm want to fall off my body.

I am helping my friend at the their cabin to get it ready for people to move in and it needed LOTS of paint.

I painted all day yesterday and again this morning and now my arm wants to fall off.

I keep telling it that it must stay put, but it does not believe me.

I have to paint more tomorrow when we finish getting stuff put away and I can get to the corner that has supplies in it.

what glue is best for forcing an arm to stay put?